Quantity Discount : 24% to 32% off 5+ @ 24% : 4612.17 + 830.19 (18%) = 5442.36 10+ @ 28% : 4369.43 + 786.50 (18%) = 5155.93 15+ @ 32% : 4126.68 + 742.80 (18%) = 4869.48